How to Convert 3GP to MP4 Online
Follow these three simple steps to convert 3GP to MP4. No software installation required. Free and secure.
Select a 3GP Video
Choose a 3GP video from an older phone, mobile archive, or another source on your device.
Choose Video and Audio Settings
Keep the original resolution and frame rate or choose new values, then keep the automatic audio settings or select a sample rate and mono or stereo output.
Convert and Download
Start the conversion, review the original and output file sizes, and download the completed MP4 video.
How Does the 3GP to MP4 Converter Work?
The CompressFly 3GP to MP4 converter decodes the video in your 3GP file and re-encodes it as H.264, with available audio encoded as AAC inside an MP4 container. You can keep the source resolution and frame rate or choose different output settings.
Conversion runs directly in your browser. Your 3GP video is not uploaded to a server, and the completed MP4 file downloads from the browser to your device.
What "directly in your browser" means
- Your 3GP video is not uploaded to a server.
- Video conversion runs locally on your device.
- The completed MP4 video downloads directly from your browser.
When to Convert 3GP to MP4
Create an MP4 copy when a 3GP recording is difficult to open, edit, upload, or share in a current workflow.
Play Old Phone Recordings
Convert archived 3GP clips from older mobile phones for players and devices that support MP4 more reliably.
Upload to Current Platforms
Prepare a 3GP video for a website, messaging service, or social platform that expects MP4 input.
Make an Editing Copy
Create an H.264 MP4 copy for an editor that cannot import the original 3GP recording.
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3GP to MP4 Converter FAQ
How do I convert 3GP to MP4 online?
Use this online 3GP to MP4 converter in three steps: 1. Select a 3GP video from your device. 2. Keep or change the available video and audio settings. 3. Start the conversion and download the completed MP4 video.
What happens when I convert 3GP to MP4?
The converter re-encodes the 3GP video as H.264 and available audio as AAC, then stores both streams in an MP4 container.
Why convert a 3GP video to MP4?
3GP was widely used by older mobile phones. An MP4 copy is usually easier to open in current browsers, phones, players, editors, and upload services.
Can I change the video resolution and frame rate?
Yes. Keep the source resolution and frame rate or select an available output resolution and frame rate before conversion.
Will converting 3GP to MP4 make the file smaller?
Not necessarily. The output size depends on the source video, selected resolution, frame rate, audio settings, duration, and visual content. Use the Video Compressor when reducing file size is the main goal.
Is the 3GP to MP4 converter free?
Yes. Convert 3GP to MP4 for free with no registration or credit card required.
Is there a file size limit, and is my video uploaded?
Your video is processed locally in your browser and is not uploaded to a server, so there is no server upload limit. The practical limit depends on your device's available memory and processing power, as well as the video's duration and resolution.